US20210115702A1 - Door locking device - Google Patents

Door locking device Download PDF

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Publication number
US20210115702A1
US20210115702A1 US17/070,949 US202017070949A US2021115702A1 US 20210115702 A1 US20210115702 A1 US 20210115702A1 US 202017070949 A US202017070949 A US 202017070949A US 2021115702 A1 US2021115702 A1 US 2021115702A1
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US
United States
Prior art keywords
slider
containment
locking device
door locking
intermediate element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
US17/070,949
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English (en)
Inventor
Fabrizio Promutico
Stefano Colucci
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bitron SpA
Original Assignee
Bitron SpA
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Filing date
Publication date
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Assigned to BITRON S.P.A. reassignment BITRON S.P.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Colucci, Stefano, PROMUTICO, FABRIZIO
Publication of US20210115702A1 publication Critical patent/US20210115702A1/en
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00—Accessories in connection with locks
    • E05B17/002—Weather or dirt protection
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/12—Casings; Tubs
    • D06F39/14—Doors or covers; Securing means therefor
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
    • E05B47/0012—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof with rotary electromotors
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B9/00—Lock casings or latch-mechanism casings ; Fastening locks or fasteners or parts thereof to the wing
    • E05B9/02—Casings of latch-bolt or deadbolt locks
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L15/00—Washing or rinsing machines for crockery or tableware
    • A47L15/42—Details
    • A47L15/4251—Details of the casing
    • A47L15/4257—Details of the loading door
    • A47L15/4259—Arrangements of locking or security/safety devices for doors, e.g. door latches, switch to stop operation when door is open
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
    • D06F39/08—Liquid supply or discharge arrangements
    • D06F39/081—Safety arrangements for preventing water damage
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
    • E05B2047/0014—Constructional features of actuators or power transmissions therefor
    • E05B2047/0015—Output elements of actuators
    • E05B2047/0016—Output elements of actuators with linearly reciprocating motion
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
    • E05B2047/0014—Constructional features of actuators or power transmissions therefor
    • E05B2047/0018—Details of actuator transmissions
    • E05B2047/002—Geared transmissions
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/30—Application of doors, windows, wings or fittings thereof for domestic appliances
    • E05Y2900/304—Application of doors, windows, wings or fittings thereof for domestic appliances for dishwashers
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES E05D AND E05F, RELATING TO CONSTRUCTION ELEMENTS, ELECTRIC CONTROL, POWER SUPPLY, POWER SIGNAL OR TRANSMISSION, USER INTERFACES, MOUNTING OR COUPLING, DETAILS, ACCESSORIES, AUXILIARY OPERATIONS NOT OTHERWISE PROVIDED FOR, APPLICATION THEREOF
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/30—Application of doors, windows, wings or fittings thereof for domestic appliances
    • E05Y2900/312—Application of doors, windows, wings or fittings thereof for domestic appliances for washing machines or laundry dryers

Definitions

  • the present invention relates to an improved door locking device.
  • the invention relates to a door locking device for washing machines, designed and manufactured in particular to allow the protection of internal parts of the door locking device itself from humidity or drops of water that can escape from the washing compartment of the washing machine, due to the rotation of the drum, but which can be used for any household appliance, in which it is necessary to protect active or operational parts from humidity.
  • door locking devices are suitable for locking or unlocking the door of a household appliance, such as, in particular, a washing machine or a dishwasher.
  • the door locking devices currently on the market are electromechanical elements, that are made of mechanical components equipped with electrical actuators, such as an electric motor and the like, for moving members, such as sliders and the like, for the automated locking and unlocking operations of a door.
  • said door locking devices are also equipped with signal and power connectors.
  • a well-known problem in the field is that of protection from water or humidity of the internal parts of the door locking devices.
  • the door locking devices are equipped with sliders able to engage with the door of the household appliance.
  • Said sliders usually come out from a containment casing, by passing through an opening or a window. It happens very often that moisture or water can penetrate through the window by flowing over the top surface of the slider. Therefore, the sliders are often equipped with grooves or holes to allow the water to drip.
  • Another object of the invention is to propose a door locking device having a structure that can be easily and economically engineered for industrial production.
  • a door locking device comprising a containment casing, having a window, a slider, comprising a locking portion, intended to engage with a door of an appliance, wherein said slider is contained in said containment casing and wherein said slider is capable of assuming a retracted position, in which said locking portion is at least partially contained in said containment envelope, and an extracted position in which said locking portion is at least partially extracted from said containment envelope, moving through said window, and a moving and controlling system of said slider, configured for allowing the passage of said slider from said retracted position to said extracted position and vice-versa, characterized in that said containment casing comprises a base, a containment intermediate element, couplable with said base, and a top lid, couplable with said containment intermediate element, wherein said moving and controlling system is arranged between said base and said containment intermediate element and wherein said slider is interposed between said containment intermediate element and said top lid.
  • said containment intermediate element may comprise an upper surface, a couple of parallel bulkheads, arranged at the lateral edges of said upper surface, and further bulkheads, extending along a lateral surface opposite to the one on which said window is located, arranged so as to surround a front opening.
  • said slider may comprise lateral ribs for containing possible water drops that may fall on said locking portion and drain them on said upper surface of said containment intermediate element.
  • said locking portion may have a groove on the top and/or two through holes for allowing drainage of water that may fall on said locking portion when said slider is in said extracted position.
  • said slider may comprise a flat drainage element, arranged at the rear of said locking portion and having a steep or a slightly sloping surface, in order to drain water on said locking portion on the upper surface of said containment intermediate element.
  • said moving and controlling system may comprise an electronic control unit comprising in turn: a print circuit board arranged below of said upper surface of said containment intermediate element and an electrical connector intended to be connected to the logic control unit of a washing machine, an appliance or the like, wherein said electrical connector is connected to, and fixed on said print circuit board and wherein said electrical connector is arranged at said front opening; or is made of a comolded plastic support, inside tracks and metal connections are arranged.
  • said base may have a first housing and a second housing
  • said slider may comprise a rack
  • said moving and controlling system may comprise moving means comprising in turn an electric motor, arranged in said first housing of said base, reducing members, arranged in said second housing for transferring the motion from said electric motor to said rack for allowing the passage of said slider from said retracted position to said extracted position and vice-versa.
  • said reducing members may comprise a pinion, keyed to the shaft of said motor, a gearwheel arranged in said second housing of said base, engaged with said pinion of said shaft, a further pinion coaxial to said gearwheel, engaged with said rack of said slider.
  • said moving means may comprise a further pinion coaxial to said gearwheel, and said slider may comprise a further rack, engaged with said further pinion.
  • said slider may have a constrained path
  • said device may comprise a controlling member, having a first end, pivoted on said containment element, and a second end engaged so as to slide inside the abovementioned constrained path, and a return spring, intended to return the slider in position, wherein said constrained path and the arrangement of said return spring are configured so as to allow the passage of said slider from said retracted position to an extracted position and vice-versa by activating said electric motor making it rotate in only one direction.
  • said constrained path may have a first seat, a second seat, opposite to said first seat, a third seat, arranged at the rear of said first seat, and a fourth seat, opposite to said first seat and parallel to said second seat.
  • said top lid may comprise a flat portion, having longitudinal reliefs, arranged parallel to each other, adapted to channel the water that may fall on it, and a steep portion having edges facing downwards.
  • FIG. 1 shows an overall view of the door locking device according to the present invention
  • FIG. 2 shows an exploded view of the door locking device according to FIG. 1 ;
  • FIG. 3 shows a perspective view of a containment intermediate element of the door locking device according to the present invention
  • FIG. 4 shows a partially sectioned perspective view of the containment casing of the door locking device according to the present invention
  • FIG. 5 shows a rear perspective view of the door locking device according to the present invention in the configuration in which the slider is in the retracted position
  • FIG. 6 shows a rear perspective view of the door locking device according to FIG. 4 in the configuration in which the slider is in the extracted position
  • FIG. 7 shows the door locking device of FIG. 6 in a longitudinal section
  • FIG. 8 shows a slider of the door locking device according to the present invention in a partially sectioned perspective view
  • FIG. 9 shows a longitudinal section of the door locking device according to the present invention, in which it is possible to see the arrangement of the electronic control unit;
  • FIG. 10 shows the connections of an electrical connector
  • FIG. 11 shows the connection of the electrical connector to the various parts of the electrical circuit of the electronic control unit of the door locking device according to the present invention
  • FIG. 12 shows the means for moving the door locking device according to the present invention in their coupling to the slider, in which the unlocking means assume a first configuration
  • FIG. 13 shows the means for moving the door locking device according to the present invention in their coupling to the slider, in which the unlocking means assume a second configuration
  • FIG. 14 shows an emergency release system of the door locking device according to the present invention
  • FIG. 15 shows a partial section of a washing machine to show the arrangement of the door locking device according to the present invention
  • FIG. 16 shows the door locking device in the configuration in which the slider is in the extracted position
  • FIG. 17 shows the door locking device in the configuration in which the slider is forced into the retracted position
  • FIG. 18 shows the door locking device in the configuration in which the emergency release system is returned to its initial position
  • FIG. 19 shows how the water flows are distributed on the slider or the intermediate containment element of the door locking device according to the present invention.
  • FIG. 20 shows an exploded view of a second embodiment of the door locking device according to the present invention.
  • FIG. 21 shows a detail in perspective of the door locking device according to FIG. 20 without containment elements and some motion transmission members
  • FIG. 22 shows a further perspective view of the detail of FIG. 21 ;
  • FIG. 23 shows a top view of the open door locking device according to FIG. 20 ;
  • FIG. 24 shows a perspective view from the bottom of the control electronics of the door locking device according to FIG. 20 ;
  • FIG. 25 shows a detail of the control electronics of the door locking device according to FIG. 20 ;
  • FIG. 26 shows the electric circuit of the control electronics of the door locking device according to FIG. 20 ;
  • FIG. 27 shows a top figure of the door locking device open in a first operating configuration
  • FIG. 28 shows a top figure of the open door locking device in a second operating configuration
  • FIG. 29 shows a top figure of the open door locking device in a third operating configuration
  • FIG. 30 shows a top figure of the open door locking device in a fourth operating configuration.
  • FIGS. 1 and 2 the door locking device according to the present invention is shown, wholly designated by reference number 1 .
  • the door locking device 1 essentially comprises a base 2 , a containment element 3 , an upper cover 4 , a slider 5 , an electronic control unit 6 , moving means 7 , and an emergency unlocking system 8 .
  • the base 2 has a first housing 21 and a second housing 22 , the function of which will be better explained below.
  • said base 2 also has a connector support 23 , in which an electrical connector can be inserted.
  • the containment intermediate element 3 can be mechanically coupled to said base 2 , by means of coupling means (such as screws and the like) or, more preferably, by interlocking, and it is substantially hollow on the outside, so as to define, with said base 2 , said first housing 21 , and said second housing 22 .
  • Said containment intermediate element 3 together with said top lid 4 , also defines a third housing 31 by means of the two side walls 32 , indicated respectively with 321 and 322 , and the upper surface 33 of the containment intermediate element 3 itself. Still, by means of said top lid said opening 34 is identified.
  • said containment intermediate element 3 also has holes 35 for fixing screws (not shown in the figure), while, between the upper surface 33 and the front surface, opposite the rear surface, on which said opening 34 is identified, a bulkheads system 36 is provided.
  • said bulkheads system 36 has a pair of parallel bulkheads 361 , which laterally delimit said upper surface 33 , and the additional bulkheads 362 , which extend along said front surface to delimit a front opening 37 , whose function will be better explained below.
  • the parallel bulkheads 361 and the further bulkheads 362 are seamless.
  • said containment intermediate element 3 has a first interspace 381 , while on the opposite side, it has a second interspace 382 .
  • the upper surface 33 in fact is interposed between said first interspace 381 and said second interspace 382 .
  • said first 381 and second 382 interspace are delimited also by said pair of bulkheads 361 .
  • said lateral housing 382 also has a slot 383 .
  • the containment intermediate element 3 also comprises fixing tabs 3 9 , for fixing the entire door locking device 1 to the household appliance that equips it.
  • the top lid 4 has a shape suitable for being arranged on the walls 32 , covering the entire surface of said containment intermediate element 3 , having side edges suitable for being arranged externally to said side walls 32 .
  • the base 2 , the containment intermediate element 3 , and the top lid 4 form together, when coupled, the containment casing I of the door locking device 1 according to the present invention.
  • the upper surface of said top lid 4 comprises a planar portion 41 , having longitudinal reliefs 411 , arranged parallel to each other, adapted to channel the water that may fall on the lid 4 , and a steep portion 42 , such that, when it is placed on said containment intermediate element 3 , the edges remain facing downwards and projecting with respect to the perimeter of said containment intermediate element 3 itself.
  • the base 2 has on the convex bottom of the housing 21 to accommodate the motor (as indicated in FIG. 2 ), a set of rectangular holes 24 , which can be seen in FIG. 4 , which have the function of expelling any water drops that nevertheless enter into the base 2 of the door locking device.
  • Said slider 5 is slidably movable and interposed between said containment intermediate element 3 and said top lid 4 , so as to be able to assume a retracted position (see FIG. 5 ) and an extracted position (see FIGS. 6 and 7 ), passing through said window 34 .
  • Said slider 5 has, also referring to FIG. 8 , a locking portion 51 , intended to be extracted through said opening 34 , when said slider 5 assumes said extracted position, as well as intended to interact with the door of the washing machine or household appliance in general, which said door locking device 1 is installed in.
  • Said slider 5 also comprises a rack 52 , inserted in said first interspace 381 , and a longitudinal lever 53 , provided with a tooth 531 , inserted and able to slide in said lateral housing 382 , movable even through said slot 383 .
  • Said locking portion 51 has a “Y”-shaped groove 511 on the top, and two through-holes 512 and 513 suitable for allowing the outflow or the passage of any water that may eventually fall on said locking portion 51 .
  • said slider 5 also has some ribs 54 for containing any possible water drops that may fall on the slider 5 , as it will be explained in detail below.
  • the slider 5 comprises, behind said locking portion 51 , a flat drainage element 55 , having a steep or slightly descending surface, for making the water to flow onto the upper surface 33 of said containment intermediate element 3 .
  • the ribs 54 are within the parallel bulkheads 361 , so that the water falls onto the upper surface 33 .
  • the electronic control unit 6 comprises, in the case at issue, a printed circuit 61 , arranged under said upper surface 33 of said containment intermediate device 3 , so as to be protected, on which the circuits that connect electronic components are shown, also visible in FIGS. 10 and 11 , including two microswitches 611 and 612 , each arranged in correspondence with a respective one of said side windows 3221 and 3222 of said side wall 322 , so that said longitudinal lever 53 of said slider 5 can interfere on them, when the latter is moved.
  • Said electronic control unit 6 also comprises an electric connector 62 , connected and fixed on said printed circuit 61 and intended to be inserted into said connector support 23 of said base 2 .
  • Said connector 62 is intended to electronically and operationally connect the electrical circuits of said printed circuit 61 to the control logic of the household appliance (not shown in the figure), on which said door locking device 1 is installed.
  • Said electronic control unit 6 also includes a magnetic reed switch 63 , to check the closed door or open door condition (as known in the art), and a PTC 64 , to protect the electric motor 71 , which actuates the device.
  • the electric connector 62 and the support for the connector 23 are placed in correspondence of said front opening 37 , which, as said, is bounded and protected from any dripping by said additional bulkheads 362 , as it will be better explained below.
  • the moving means 7 comprise an electric motor 71 provided with a shaft 72 , arranged in said first housing 21 of said base 2 , a pinion 73 , keyed on said shaft 72 , a gearwheel 74 arranged in said second housing 22 of said base 2 , engaged with said rack 52 of the slider 5 , via a pinion 75 integral therewith.
  • Said electronic control unit 6 and said moving means 7 constitute the movement and control system of the slider 5 .
  • the emergency unlocking system 8 comprises (see also FIG. 14 ) a lever 81 , having a first portion 811 , having a free end interfering with said tooth 531 of said longitudinal lever 53 of said slider 5 , a second portion 812 , that forms a “V” with said first portion 811 , a pin 813 , arranged between said first portion 811 and said second portion 812 at the vertex of the “V” that said first 811 and said second 812 portions form.
  • Said pin 813 is pivoted on said base 2 .
  • said emergency unlocking system 8 also comprises a further longitudinal element 814 , coupled at one end with said second portion 812 , by means of a flexible elbow 815 , which in the present embodiment is made of plastic.
  • said longitudinal element 814 comprises a release relief 816 , which a lanyard or any other traction member (not shown in the figures) can be coupled to.
  • Said emergency unlocking system 8 also comprises a spiral spring 82 , arranged on said pin 813 , capable of holding said lever 81 in a predefined position as better described below.
  • a functional operation and a protection operation will be distinguished with respect to possible drops of water that may fall on the door locking device 1 itself.
  • FIG. 15 in which the installation of the door locking device 1 in a washing machine 9 is shown, of which the body or chassis 92 and the cover 91 are clearly distinguished.
  • the slider 5 when it is in the extracted position, is configured to interfere with the lid 91 , so as to hold it closed.
  • the pinion 75 engaged with the rack 52 of the slider 5 , is thus capable of passing the slider 5 itself from the retracted position, in which the locking portion 51 of the slider 5 is fully or partially contained within the containment casing I, and in which said longitudinal lever 53 closes the microswitch 611 overlapping the respective window 3221 , to the extracted position, in which the locking portion 51 of the slider 5 projects from said opening 34 , and therefore from said containment casing I, and the longitudinal lever 53 , thus moving, opens the microswitch 611 and closes the microswitch 612 , physically overlapping the window 3222 .
  • the control logic unit of the washing machine 9 is capable of electronically determining whether the door 91 is locked or not. Whether the door 91 is closed or not is detected by the control unit of the washing machine through a signal sent by the reed switch 63 provided on the printed circuit 61 , which interfaces, in case of closure, with a magnet placed on the door 91 in correspondence of the same (not indicated).
  • the lever 81 when the slider 5 is in said extracted position, the lever 81 is in an initial position, in which it is held by the spiral spring 82 , and in which it does not interfere with the movement of the slider 5 .
  • the door locking device 1 in case of the water would fall on the upper surface of the top lid 4 , it would initially be channeled through the longitudinal reliefs 411 of the flat portion, which would tend not to make it fall laterally and possibly to divert it towards the steep portion 42 , thus preventing it from entering the door locking device 1 .
  • part of the water may in any case fall onto the surface of the same, penetrating, for example, through the opening 34 inside the door locking device 1 .
  • part of the water is collected by the groove 511 , which tends to divert it, due to the “Y” shape at the sides, causing it to fall.
  • Other part of the water can, however, be channeled and drip through the two through-holes 512 and 513 , which are located approximately at the edge of said locking portion 51 , so as to drain the water away from the body of the door locking device 1 .
  • the ribs 54 will tend to collect the water on the flat drainage element 55 , which in turn will make it converge on the upper surface 33 of said containment intermediate element 3 , so that, through the bulkheads 361 and 362 , it can flow without risking to drip onto the electronic part of the electronic control unit 6 or on the electric connector 62 , as shown in FIG. 19 , in which the flows of the dripping water are distributed with dashed arrows.
  • the flat drainage element 55 facilitates the water outflow from the surface of the locking portion 51 of the slider 5 onto the upper surface 33 of said containment intermediate element 3 .
  • the water should still penetrate, for example, due to particularly violent splashes, between the containment element 3 and the top lid 4 , in this case, the water would still tend to be contained between the parallel bulkheads 361 , so as to lie on the upper surface 33 of the containment intermediate element 3 and subsequently, guided again by the bulkheads 361 , to bifurcate into two flows guided by the bulkheads 362 , so as to prevent water and humidity from reaching the electronic control unit 6 and the connector 62 .
  • FIGS. 20-24 the structure of a second embodiment of the door locking device according to the present invention is observed.
  • the slider 5 comprises, in addition to the rack 52 , a further rack 52 ′, in correspondence with which, on a surface in particular in this case facing upwards, a constrained path 56 is obtained, having a first seat 561 , a second seat 562 , opposite to said first seat 561 , a third seat 563 , arranged on the rear of said first seat 561 , and a fourth seat 564 , opposite to said first seat 561 , and parallel to said second seat 562 .
  • the door locking device 1 comprises a control member 10 , having a first end 101 , hinged on said containment element 3 , and a second end 102 , engaged or arranged so as to slide in the aforementioned constrained path 56 .
  • Said slider 5 also comprises a tooth 57 , which cooperates with the switch 67 by opening it, as better defined hereinafter, a depressed portion 57 ′, which does not activate the switch 67 , leaving it closed, a raised portion 57 ′′, at the same height tooth 57 , which cooperates with the switch 67 by opening it.
  • a depressed portion 57 ′ which does not activate the switch 67 , leaving it closed
  • a raised portion 57 ′′ at the same height tooth 57 , which cooperates with the switch 67 by opening it.
  • the door lock 1 of the second embodiment in question also has a return spring 58 , intended to return the slider 5 to the extracted position, as will be better explained below.
  • the gearwheel 74 of said moving means 7 has a shaft 741 , to the end of which a further pinion 742 is connected, intended to engage with said further rack 52 ′.
  • the electronic control unit 6 (see FIGS. 24-26 ) is realized by means of a molded plastic support 65 , within which slopes and metal connections 66 are arranged, suitably sheared.
  • Said electronic control unit 6 also comprises a switch 67 having a relief 671 , intended to engage with the tooth 57 and the portion 57 ′′ of said slider 5 , when the latter is brought into suitable positions as better detailed below.
  • the motor 71 of the moving unit in its active action i.e. when powered
  • the return spring 58 always tends to return the slider 5 to the extracted condition, opposing the action of the motor.
  • said slider 5 is extracted, due to the interaction of the tooth 57 and of the portion 57 ′′ with the relief 671 of the switch 67 , there are different signals in succession, due to the opening and closing of the switch 67 by means of the relief 671 .
  • the electronic control unit 6 can be realized by means of a printed circuit (as in the first embodiment described above) or other systems for the realization of electrical or microelectronic circuits.
  • FIG. 26 an electrical diagram and some main control connections between the electric motor 71 , the reed switch 63 and the switch 67 can be seen.
  • the structure of the door locking device 1 according to the present embodiment is similar to that described with respect to a first embodiment. Therefore, the operation in the case of drops falling on it is completely similar to that of the first embodiment described above.
  • the electric motor 71 is activated by the household appliance control logic (not shown in the figures), by rotating according to the arrow A, the pinion 73 , moved by said gearwheel 74 , which in turn moves said further pinion 742 , acting on the racks 52 and 52 ′, brings the second end 102 of said control member 10 from said first seat 561 , to said second seat 562 , as shown in FIG. 28 .
  • the contact 67 closes, since the relief 671 passes beyond the portion 57 ′′ from the opposite part of the tooth 57 .
  • the extension or the stroke of the slider 5 is limited (by defining the position 563 on which the end 102 of the member 10 on the slider 5 stops) by the fact that the free end of the slider 5 touches against a wall of the door of the household appliance to be locked.
  • said second end 102 of said control member 10 passes from said third seat 563 to said fourth seat 564 , as shown in FIG. 30 , generating the same position conditions of the slider 5 , spring 58 and state of switch 67 reported in the state represented in FIG. 28 .
  • the end 102 while remaining on another seat 564 of the constrained path with respect to the seat 562 of FIG. 28 , the height along the direction of the motion is identical.
  • the tooth 57 intervenes in a particular and anomalous operating condition, i.e. the one in which, due to some unauthorized use, the system is activated not in the presence of the household appliance door and therefore the stroke of the slider 5 is not interrupted by contact with the free end of the slider 5 against the household appliance door (which is not present in this anomalous condition).
  • a particular and anomalous operating condition i.e. the one in which, due to some unauthorized use, the system is activated not in the presence of the household appliance door and therefore the stroke of the slider 5 is not interrupted by contact with the free end of the slider 5 against the household appliance door (which is not present in this anomalous condition).
  • the tooth 57 intervenes, which, interacting with the relief 671 of the switch 67 , sends an excessive stroke signal, causing the household appliance to be in fault.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Casings For Electric Apparatus (AREA)
  • Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
US17/070,949 2019-10-15 2020-10-15 Door locking device Pending US20210115702A1 (en)

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US20200347641A1 (en) * 2018-01-29 2020-11-05 Illinois Tool Works Inc. Motorized Lock Switch Module For A Door-Lock For Appliances

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US5437303A (en) * 1992-05-29 1995-08-01 Johnson; Addison M. Apparatus for containing fluid leaks and overflows from appliances
KR100820739B1 (ko) * 2007-01-04 2008-04-11 삼성전자주식회사 세탁기
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WO2014017783A1 (fr) * 2012-07-23 2014-01-30 Lg Electronics Inc. Dispositif de verrouillage de couvercle d'une machine à laver
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200347641A1 (en) * 2018-01-29 2020-11-05 Illinois Tool Works Inc. Motorized Lock Switch Module For A Door-Lock For Appliances
US11846063B2 (en) * 2018-01-29 2023-12-19 Illinois Tool Works Inc. Motorized lock switch module for a door-lock for appliances

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EP3808888A1 (fr) 2021-04-21
KR20210045323A (ko) 2021-04-26
EP3808888C0 (fr) 2023-11-22
CN112663290A (zh) 2021-04-16

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